INSTRUCTION MANUAL
CAUTION: Read All Instructions Before Operating Equipment
MFJ ENTERPRISES, INC.
300 Industrial Park Road
Starkville, MS 39759 USA
Tel: 662-323-5869 Fax: 662-323-6551
COPYRIGHT 2005 MFJ ENTERPRISES, INC.
C
Model MFJ-1731
VERSION 1A
DISCLAIMER
Information in this manual is designed for user purposes only and is not intended to
supersede information contained in customer regulations, technical
manuals/documents, positional handbooks, or other official publications. The copy of
this manual provided to the customer will not be updated to reflect current data.
Customers using this manual should report errors or omissions, recommendations for
improvements, or other comments to MFJ Enterprises, 300 Industrial Park Road,
Starkville, MS 39759. Phone: (662) 323-5869; FAX: (662) 323-6551. Business hours:
M-F 8-4:30 CST.
MFJ-1731 Pocket Roll-Up
440 MHz
INTRODUCTION
Thank you for purchasing the MFJ-1731 Pocket Roll-Up Antenna . The MFJ-1731 is a ½
wave roll-up J-Pole designed for 440 MHz. Hang it and operate with MFJ roll-up antennas
anywhere and everywhere! The MFJ-1731 comes completely assembled and is ready to connect
to your radio with BNC connector; however, if your radio does not have a BNC connector, you
will need an adapter. (MFJ-7737)
OPERATION
1. Suspend the MFJ-1731 in a vertical position. The hole located in the end of the antenna
can be used to hang the antenna. The antenna must be hung up using a non-conductive
material such as a clothespin.
2. Do not set up the antenna so that it could touch a conductive object. This will cause
detuning of the antenna. The antenna may also be detuned if it is set up close to any
conductive object such as a metal window.
3. The antenna is designed to work without a ground plane, but operation may be enhanced
when located over a large conductive surface like a refrigerator or file cabinet.
4. If the antenna will be permanently mounted outdoors, you may wish to weatherproof it
by mounting it inside a length of 5/8” PVC. The PVC may affect the performance of the
antenna.
5. Operate on the 440 MHz band with no tuning needed.
Technical Assistance
If you have any problem with this unit first check the appropriate section of this manual. If the
manual does not reference your problem or reading the manual does not solve your problem, you
may call MFJ Technical Service at 662-323-0549 or the MFJ Factory at 662-323-5869. You
will be best helped if you have your unit, manual and all information on your station handy so
you can answer any questions the technicians may ask.
You can also send questions by mail to MFJ Enterprises, Inc., 300 Industrial Park Road,
Starkville, MS 39759; by Facsimile (FAX) to 662-323-6551; or by email to
[email protected]. Send a complete description of your problem, an explanation of
exactly how you are using your unit, and a complete description of your station.
FULL 12-MONTH WARRANTY
MFJ Enterprises, Inc. warrants to the original owner of this product, if manufactured by MFJ Enterprises,
Inc. and purchased from an authorized dealer or directly from MFJ Enterprises, Inc. to be free from
defects in material and workmanship for a period of 12 months from date of purchase provided the
following terms of this warranty are satisfied.
1. The purchaser must retain the dated proof-of-purchase (bill of sale, canceled check, credit
card or money order receipt, etc.) describing the product to establish the validity of the warranty
claim and submit the original or machine reproduction of such proof of purchase to MFJ
Enterprises, Inc. at the time of warranty service. MFJ Enterprises, Inc. shall have the discretion to
deny warranty without dated proof-of-purchase. Any evidence of alteration, erasure, of forgery
shall be cause to void any and all warranty terms immediately.
2. MFJ Enterprises, Inc. agrees to repair or replace at MFJ's option without charge to the
original owner any defective product provided the product is returned postage prepaid to MFJ
Enterprises, Inc. with a personal check, cashiers check, or money order for $10.00 covering
postage and handling.
3. MFJ Enterprises, Inc. will supply replacement parts free of charge for any MFJ product
under warranty upon request. A dated proof of purchase and a $8.00 personal check, cashiers
check, or money order must be provided to cover postage and handling.
4. This warranty is NOT void for owners who attempt to repair defective units. Technical
consultation is available by calling (662) 323-5869.
5. This warranty does not apply to kits sold by or manufactured by MFJ Enterprises, Inc.
6. Wired and tested PC board products are covered by this warranty provided only the
wired and tested PC board product is returned. Wired and tested PC boards installed in the
owner's cabinet or connected to switches, jacks, or cables, etc. sent to MFJ Enterprises, Inc. will be
returned at the owner's expense unrepaired.
7. Under no circumstances is MFJ Enterprises, Inc. liable for consequential damages to
person or property by the use of any MFJ products.
8. Out-of-Warranty Service: MFJ Enterprises, Inc. will repair any out-of-warranty product
provided the unit is shipped prepaid. All repaired units will be shipped COD to the owner. Repair
charges will be added to the COD fee unless other arrangements are made.
9. This warranty is given in lieu of any other warranty expressed or implied.
10. MFJ Enterprises, Inc. reserves the right to make changes or improvements in design or
manufacture without incurring any obligation to install such changes upon any of the products
previously manufactured.
11. All MFJ products to be serviced in-warranty or out-of-warranty should be addressed to
MFJ Enterprises, Inc., 300 Industrial Park Rd, Starkville, Mississippi 39759, USA and must
be accompanied by a letter describing the problem in detail along with a copy of your dated
proof-of-purchase and a telephone number. This warranty gives you specific rights, and you may
also have other rights, which may definetly vary greatly from state to state depending on your
location.
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